Installing trailer balls and switch balls is a relatively simple process as long as you have the correct ball size for your receiver hitch. Once you have the correct ball size, all you need to worry about is correct placement and that the nuts are screwed on tightly. How Trailer Balls and Switch Balls Work

Trailer balls and switch balls are hitch accessories mounted on your receiver hitch's ball mount. It's the piece of towing equipment that couples the trailer to the towing vehicle and bears the load of the trailer's weight. How Trailer Balls and Switch Balls Work